Grinding or abrading machine.



H. W. NEWMAN.

GRINDING 0R ABRADINGMAGHINE.

APPLICATION FILED MAR. 25, 1910.

'fatented 0013.29, 1912.

4 SHEETS-$HEET 1.

7 H r w J Wu Z a, 5 4

H.'W. NEWMAN.

GBINDINGOB. ABRADING MACHINE.

APPLICATION mum EAR.25, 1910.

1342,81? Patented ct.29,1912.

4 SHEETS-1333B! 2.

' p I I r 24 Q. I

H. W. NEWMAN.

GRINDING 0R ABRADING momma. APPLICATION TILED MAR. 25, 1910. 1,04%,811 Patented 0611.29, 1912.

QSHEBTSwSHEIiT s.

\ Ha W NEWMAN.

GRINDING OR ABRADING MACHINE.

APPLICATION FILED MAR.25,1910 I 42, 11 Patented 00c. 29, 1912.

4 SHEETS-SHEET 4.

Wifiwssw [Til/67222 ed new and useful Improvements in Grind- 4 vation on the oration.

(" ir I T51 .4 5.42% i HENRY VIALTERS NEVIMAN, OF MILL HILL, ENGLAND.

GRINDING OR ABRADING MACHINE.

To all whom it may concern:

Be itknown that I, HENRY -Wnnrnns Kniv- :uarna' Subject of the King of the United Kingdom of Great Britain and Ireland, re siding at The "Priory, Mill Hill, in the county of Middlesex, l lngland, have invent ing'or Abrading Machines, of which the following is a specification.

This invention relates to grinding or abrading machines especially applicable tor grinding drills and other tools or cutters,

such as key grubs or end-slotting cutters,

and it has for one of its objects so to con struct the said machines as to enable them, at. a single operation, to grind a drill with the nec'essa ry backing otf behind each of its cutting edges, Without necessitating the drill being rotated about its axisor moved angularly in a lateral direction.

The invention may be carried out in different vays, those hereinafter described and illustrated in the accompanying drawings,

being I given merely' as convenient examples.

In the said drawings :Figure 1 is a plan of one construction of the apparatus accord-' ing -to the present invention; Fig. 2 is a front'elevation of the said apparatus with 3 a plan of the driving mechanism 'situatedbeneath the bed late; Fig. 4 is a sectional eleline 44 of Fig. 5, looking in the direction of the arrows; Fig. 5 is a righthand side elevation of the abrading disk and mountings'seen at the left-hand side of Figs.

1 and 2, and as viewed in a direction per 'p'endicular to theaxis of rotation of the said disk; Fig. 6 is a right-hand'side elevationaxis of rotation of the said disk; Figs. 1 and 8 are respectively a front elevationand a left-hand side elevation of detached portions of the tool supp )rt; Figs. 9 and 10 are diagrammatic plan views of respectively different arrangements of the abrading disks;

and Figs. 11 and 12 are perspective views.

of portions of tools for the grinding or sharpening of which 'the' arrangements flghowmdn Figs. ,9" andlO are respectively ad apted.

In the arrangement illustrated in Figs. 1' 'to 8 of the drawings, and which is especially Specification of Letters Patent.

Pz-tteiited Oct. 29, 1912-.

Application filed March 25. 191-0. Serial No. 551,426.

Yist drills, there are provided two rotating grinding disks 1, 2 whose flat 'abrading tacos-\\'liei'l vertical, as represented in Figs. 1 and 2-arc at an angle to each other cor-* responding with the angle of the drill end or cutting edges, as shown clearly in Fig. 1, (wherein a drill 30 is represented in dotand-dash lines) the peripheries of the said disks being in contact or nearly in contact with each other. Each of the disks 1. 2 is secured to its respective spindle 3 or 4: in any convenient manner, and each such spindle is free to rotate in a bearing 5 or G pivoted between two center studs 7 capable of being adjusted, and locked in adjusted position, in the two arms of a forked or double standard or slider 8 or 9. By this arrangement the bearing 5 or (3 is free to oscillate about a horizontal axis (viz., that of the respective. studs 7) which is perpendicular to the axis of the spindle 3 or 4, and situated in a vertical plane preferablyclose t0 the rear of the respective ahrading surface. As a means of rotating the spindles 3 and 4 there are shown to be secured thereon, pulleys 10, 11 respectively, each for receiving a driving Strap (which is not represented in the drawings),

.is shown in the drawings) and they may be secured in adjusted positions by any convenient means, such for example as the bolts and lock nuts 15, the former of whlch are threaded throngl'i holes in the bases of the standards 8, 9 and may be screwed hard down upon the bed plate 14. The two disks 1, 2, may both be rotated in the direction of the hands of a clock, as indicated by the arrows in Figs. 1 and 2, so that the adjacent parts of their peripheries travel in opposite directions. and each of the bearings 5, (3 is provided with an arm 16, or 17 respectively,

fast thereto and pivotally connected to the upper end of a link 18 or 19, which passes its lower end, is in pivotal connectionwith a crank pin 21 or 22-seenred, preferablyad-. justablv. in a, crank disk 23 or 24. The crank disks 23, 24. are secured to shattsflii,

adapted for grinding straight-fluted and 26 respectively, these shafts being gearedtothrough a slot '20 in the bed plate 14 and, at

.gether by equal'bevel toothed gear 27 and the former of such shafts is rotated by worm gearing 28 driven by a strap pulley 29 fast on the worm shaft 48. The crank pins 21, 22 are secured in such positions in the disks 23, 24.- as to cause the d1sks 1, 2 to be rocked from their vertical positions respectively in a forward and rearward direction, as'indieated in dot and dash lines in Figs. 6 and 5 respectively, and again back into their 'respective vertical positions, the oscillations of the bearings 5, 6, for securing this result, being simultaneous but in relatively opposite directions, that is to say such directions that, as the upper part of the disk 1 is being advanced toward or over one side of the tool '30, the lower part of the disk 2 is, to a corresponding extent, beingadvanced beneath the other side of the said tool.

In front oft-he two abrading disks 1, 2 and situated symmetrically in relation .thereto, there is provided a tool table 31 capable of being adjusted in a vertical direction to suit the different diameters of the tools to be ground. In the example illus trated this vertical adjustment of the tool table 31 is effected by means of a spur pinion 32 which gearswith a toothed rack 33 fast to the pillar or vertical stem 34 of the said table. The pillar or stem 34 is of triangular shape in cross section, as shown in dotted lines in Fig. 1, and is free'td slide vertically in a correspondingly triangular sleeve 35 (see particularly Fig. 7) which has a rectangular flange or base 36 capable of moving forward and backward in guides 37 in a direction symmetrical in relation to the angle formed -.by the two abrading disks 1, 2. The bed plate 14 is slot-ted to allow of the adjustment of the pillar 34:, which penetrates such plate. The pinion 32 is secured on a shaft 38 supported in bearings fast to the sleeve -35, the said shaft being provided with a wheel or head 39 by which it may be turned by hand for raising or lowering the tool table'31. The sleeve 35 is further provided with a pinching screw or equivalent 40, by tightening'which,

the tool table 31 can be secured in any desired position of vertical adjustment. The tool table 31 is provided with a tool holder -11 which is movable in dovetail or equivalent guides 42 on the said table, the tool holder, as shown best in-Figs. 2 and 7, being formed with a V-shaped groove in which the tool to be ground is laid, and in which it may be held in proper position by a yoke 43 pivoted to thesides of the tool holder 41. The horizontal member of the yoke 43 is adapted to engage with the groove of a twist drill so as to retain the said drill in the position necessary for insuring both ofits cutting edges being symmetrically sharpthe said holder being'capable of provided with an abutment 44 adjustable along two rods 45 fast to the said holder, for engaging with the non-cutting end of the drill 30 and thereby assisting in holding the latter. The abutmentcan be secured in any desiredposition on the rods 45 by means of the clamping plate 4:6-an'd screw and winged nut 47. v

F rom the foregoing it will be seen-that the tool table 31, sleeve 35 and flange 36 are together adjustable upon the bed plate 14, toward and away from the 'abrading disks 1, 2, andthat thetool holder 41 is also adjustable in like directions upon the tool table 31. Any desired means may vided for securing the tool table 31 relatively to the bed platel, or the tool holder 41 to the tool table 31,- but, as the action of the oscillating abradin disks 1, 2 on the tool end is causative o or involves, a. longitudinal reciprocation of the said tool, it is preferable that the tool table 31 be secured to, the bed plate 14: and thejtool holder 41 be left loose on the tool table so as toadmit of sliding freely on thetool table; if desired, however, instead of the arrangement just mentioned, the tool holder may besecured to the too-l table and the latter be slidablev on the bed plate. When a drill is pressed into contact with the front surfaces of the rotating disks 1, 2 as indicated in dotand-dash lines in Fig. 1, the said surfaces will sharpen the cuttin edges of the drill, and the oscillation 0 the said surfaces will automatically produce the necessary curvilinear backing off, the angle of thesaid backing off depending upon the length of throw for which the crank pins 21, 22, had previously been adjusted, and the drill meanwhile be-- ing reciprocated longitudinally by reason on the one hand, of the oscillation of the abradingflisks 1, 2, causingFthe drill to be moved backward, and on the' other hand the pressure exerted to keep the drill up to the abrading disks, nioving it forward. The

adjustment as before mentioned of the crank pins 21, 22 in the respective crank disks 23, 24, will necessitate practically the employment of longer and shorter links 18, 19, for insuring that the abrading bodies 1, 2, when in their zero positions, shall have their abrading faces vertical; for this purpose the said links may each be formed of two tel escopically adjustable arts (as indicated in dotted lines in Fig. 2i so that they may be lengthened or shortened accordingly; or the same result may be secured byother means such for example as a substitution of other links of different lengths for those then on the machine, or by irroviding the' bearing brackets 5, 6 with slots wherein the pins pivotally connecting the said brackets to the links 18, 19, may be adjusted to different positions.

en; invention,

l i lensani and of Lhe said disks at lire ion to the harliii es: With iereinhel ore Y enieniily be aria altler lhe di red), led a l v V L hei'oro described Elblld-Hlg niabnould the V chine at any time he required for grinding a lefi-ilanded cutting drill, it inay readily adjusted for atlaining that .resul.t by reversing the position of the crank pins 22 on their respective crank disks 24:, that to say, moving them diametrically across the said disks to opposite sides of the. axes about which they respwlively revolve.

'ine hell's for transmitting motion to the oulleys lo, 11 are not shown in the drain"- ingzs because they form no part of the presd but it Will be readily understood lhal', in View of the arcual movement oli' these pulleys, the said hands are guided over suitable rollers, or otherwise, for the purpose of -ex exiting them from leaving r lhe said pulleys.

ll U112) LU DC in a n v ac nenlaanei 1e angular pesuions necessary 1e allrading disks 2 to prmluce sired angle of backing oil the axes of the spindles 3, being situated in converging; ijll'zlllQl or diverging verlical r planes according to lhe angle lo he given to the cutting edges relatively lo the axis of the respecliie fool, thus, for an ordinary llal. drill (he said axes are sitnalcd in eon- \crlical planes as in Fig. 1, foa key-grail or end-sloliing eul'ier wherein ihe culling e es are perprnoicular to the longitudinal. axis of each tool, as shown in Fig: 11, the spindle axes are in parallel vertical plane; as diagramn'ralically illustrated in Fig. 9, While for a tool having a hollow or 1 end, as shown in Fig. 12, the spin- Vere f rece so ill axes are in diverging vertical planes as d' raunnal'i :ally il uslraljed in Fig.

inslea l he spindles l'iein rlifalicd the means hereinheiore deserihe 1 they may each he rotated by a separate, electric motor operalivoly fast to respective hearing or ii and, familiar, instead of the tools being; held down 011 the holder 41 by a game 43 as previousy explained, they may be retained thereon by a screw clamp or other convenient means.

The clireetiono'f rotation of the abraeiing a or bodies l 2, may be either cloclrm'iso that is to say, the direction I 'lhe same horizonral lane iferrcd and uiosi con the n'n'cntroo. is

plana 11y grind i orting said bodies in faces contain contained by l lo groom planes cenlaining res 'aining them at a proper A grinding or two revoluol= srmporling 1} which diamel'ral l bodies coniain an ang contained by he z ry the relative mg a rei'oluhle a ory liczrmp l'h said hearing ,he

prisingtwo ZQVQlillJl tool support: oscil upon axes parzl planes oi? lhe res with the respect ground when said tool driving ineans for revo 'iously mentioned l and L, or counl; or body may be e other one counn being ransmitrcnienl. lllLHSIDlSSiUn while in the achave shown an log the two abrading .r substantially in the (which is the prei enl arrangement) oi leslricte d to that aras prm ided their mutual reialionship is not afiecim mi u; be arranged in sol vertical the same in the said bodies Jslantially the same .chned plane.

1. A grinding or ahrading machine com- Lw'o revoluhle abrading bodies each :g face; bearings positions in which upon rcs icclivc grinding angle equal to the angle he cutting: of the tool 1 and in nositions in which the (-live grinding faces 'gularily ,.-,l, rresponding with angle of backing o'll' oi said. cutting s; and driving means for revolving said i lillillig machine combodies; oscillatory r bodies in positions ines upon respective e equal to the angle culling edges of lhe lool ound; driving means for revolving and means operative to oscill l bearings sinniltaneously with the mon of said driving means in order to angulariiv of the planes oniaining lhe grinding faces of said bodies. 3. A grimling or abrading machine com- 4 loading body; an oscilerel or; pivots suppm'ling' axis of said pi'vols being parallel. with the line of Contact bclwecn (he nd the grinding face of driving means for reand means adapted in q about said pivots and liody sinmll'aneousi on said support;

ving said bodies; operatively connected with said simultaneous? andv reversely oscillate said bearings and thereby to reversely rock said bodies simultaneously with the driving tliereoii,

A/grinding or abrading machine compris ng two revoluble abrading bodies each aving a planar-y grinding face; bearings supporting said bodies with their peripheriesjf-in contact or close proximity at one point and with diametral lines u on the said grinding faces of the respective odies passmg through such point inclosing an angle approximately equal to the angle contained by the cutting edges of the tool to be ground; and driving means for revolving said bodies. l

6. A grinding or abrading machine comprising arevoluble abrading disk; an oscil lat-ory bearing therefor; a pivotal support for said bearing the axis of said support being situated to the rear of the grinding face of said disk and intersecting the axis there of; a tool support at an angle to the axis of said disk; driving means for revolving said disk; and adjustable means operativoly connected with said bearing for rocking it simultaneously with the driving of said body.

7. A grinding or abrading machine comprising two revoluble abrading disks the axes of which contain an angle; a tool support bisecting the! said angle; oscillatory bearings for said disks; pivotal supports for said bearings, the respective axes of said supports being situated to the rear of respective grinding faces of the disks and intersecting the axes of respective disks; drivling means for revolving said disks; and two similar adjustable gears operatively con nected with said bearings and adapted to simultaneously reversely and equally oscillate said bearings during the driving of said bodies.

8. A grinding or abrading machine comprising two revoluble abrading disks the axes of which. contain an angle; a tool support bisecting said angle; bearings adapted to support said disks about in peripheral contact and with the disks re versely inclined toward the tool on said support and driving means adapted to simultaneously rotate said bodies.

9. A. grinding or abrading machine comprising a revoluble abrading body with a planar-y grinding face; an oscillatory bearing therefor; a pivotal support for said bearing, the axis of said support extending diametrically of said revoluble body; a tool slide adapted to support a tool at an angle to the axis of said. body; driving means for revolving said body; meansoperative to oscillate said bearing on. said pivotal support simultaneously with the driving of sa body; and an adjustment operative on 5- i the amplitude of of also bear m from a given zero position in relatively opsupport; an oscillatory bearing for said A grinding or abrading machine com- LlSlDg a revoluble abrading body; an oscillatory bearing therefor; a pivotal support for said bearing, the axis of said supportlntersecting the axis of said revoluble body; a tool slide adapted to support a tool at an angle to the axis of said body; driving means for revolving said body; and reversible means operative to rock said bearing posite directions simultaneously with the driving of said bod 11. Av grinding or abrading machine com prising a revoluble abrading body; a tool body; a pivotal support for said bearing, the axis of said support being parallel with the edge to be ground of the tool when on said support; driving means for revolvin said body; means operative to rock said bearing simultaneously with the drivingof said body; a control for said means; and a lock operative to prevent the oscillation 0 said hearing when desired. 1

12. A grinding or abrading machine comprising two revoluble ahrading bodies; a tool support; oscillatory bearings for supporting said bodies in such positions that diamctral lines on the faces of said bodies inclose an angle equal to the angle inclosed between the cutting edges of the tool to be ground; driving means for simultaneously revolving said bodies; means operative to rock said bearing simultaneously with the driving of said bodies; and an adjustment for variably positioning the bodies in the directions (if their respective 13. A grinding or abrading machine comprising two revolnble abrading bodies; a tool support; oscillatory bearings for supporting said bodies in relative angular positions; sliders; pivotal supports for said bearings in said sliders: guides for said sliders; adjustments for fixing the positions of the sliders in respective guides; driving means for revolving said bodies; and means operative to oscillate said bearings simultaneously with the driving of said bodies.

14. A grinding or abradin machine comprising two revoluble abracing bodies; a tool slide adjustable toward and from said bodies; oscillatory bearings supporting said bodies in such positions that the angle inclosed by the axes of oscillation is bisected by the axis of a tool on said slide; sliders; 129 pivotal supports for said bearings in said sliders; guides for said sliders parallel with, the axes of said bodies; ad'ustments for fixing the positions of the sli ers in respective guides; an adjustment for varying and fixing the tool support at different. pos tions in the direction of its axis; driving means for revolv' 1g said bodies; and means operative to use late said bearings simultaneously ing of said bodies.

noaasis' 15. A. grinding or abrading machine combodies; sliders; pivotal supports prising two revoluble abrading bodies; a bearings 1n said sliders; guides vertically adjustable tool support; oscillatorybearings for-supporting said bodies in relative angular positions; sliders; pivotal supports for said bearings in said sliders; guides for said sliders; adjustments for fixing-the positions of the sliders in respective guides; driving means for revolving said bodies; means operative to oscillate said bearings simultaneously with the driving 01":

said bodies; and locking means for fixing said tool support in any adjusted position.

16. A grinding or abrading machine comprising two revoluble abrading bodies; a tool support; oscillatory bearings for supporting said bodies; sliders; pivotal supports for said bearings in said sliders; guides for said sliders; adjustments for fixing lhe positions of the sliders in respective guides; driving means for revolving said bodies; and means inter-geared with said driving means and operative to simultaneously .and oppositely rock said bearings.

17; A grinding or abrading machine coinprising two revoluble abradii'ig bodies; a vertically adjustable tool support;- a bori- Zontally adjustable slide carrying said sup port; oscillatory bearings for supporting said for said for said sliders; adjustments for fixing the positi of the sliders in respective guides; driv. .ig

means for revolving said bodies; oppositely driven shafts; eranlrs on said shafts; and connecting rods between respective cranks and bearings, i

18. A grinding or abrading machine coniprisine' two 'revoluble abrading bodies; averticaily adjustable tool support; a horizon-tally adjustable slide carrying said sup-- port; oscillatory bearings for supporting said bodies; sliders; pivotal supports tor said bearings in said sliders; guides for said sliders adjustments for fixing the positions or" the sliders in respective guides; driving means for revolving said bodies; oppositely driven shafts; crank disks on said shafts; crank pins adjustable radially of said disks; arms extending axially from said bearings; and connecting rods pivotally connected be tween said crank pins: and respective in witness whereof l have hereunto my hand in the presence of two witnesses HENRY WALTERS NEWMAJ. vlitnesses:

C, NEWMAN,

Barrens NISE. 

